Film clip



H. L. DURST.

FILM CLIP.

I APPLICATION FILED JUNE I7, I920. 130 441 r Patented Mar. 7, 1922.

zgyz 19 w I a i I J fl 6' um 0+ III KW W UNITED STATES PATENT OFFICE.

. HAROLD I1. BURST, OF SPOKANE, W'ASHINGTON.

To all whom it may concern:

Be it known that I, HAROLD L. DURsT, a citizen of the United States, residing at Spokane, in the county of Spokane and State of lVashington, have invented new and useful Improvements in Film Clips, of which the following is a specification.

This invention relates to improvements in film clips of that character in which the film is perforated by the clip, and wherein the operation of supporting the film in the developer is very greatly facilitated.

It is one of the objects of this invention to provide a clip which will perforate and hold the film end, and which in the performance of this function, will expose practically all of the opposite areas of both sides of the film end so gripped to the action ,7 of the developer.

A further object is to provide jaw members with teeth between which the film end is inserted, the teeth being of a character .to guide the film end into position between the teeth for perforation thereby.

A further object is to provide the jaws or jaw members with a pluralitv of teeth, the coacting set of teeth of the jaws functioning in such a novel manner that only one tooth of the set will actually perforate the film. the remaining teeth serving to engage V the film in such a novel manner as to initiate entrance and passage of the perforating tooth therethrough.

In the more specific form of the invention, each set of teeth comprises a perforating tooth of substantially V-shaped form, and one or more film engaging teeth of like form, the film engaging teeth being offset in such novel manner that they will coact in lateral and edgewise relation with the perforating tooth to cause the latter to shear intothe film, in the performance of its perforating function, the engaging teeth preferably being tin-sharpened and dull both as regards their edges and apices.

Other objects and features, of the invention will be more fully described in connection with the accompanying drawing and will be more particularly pointed out in and by the appended claims.

In the drawing Figure 1, is a view in side elevation of one form of my invention.

Figure 2, is a view looking from the left of Figure 1.

Figure 3, is a plan vie Specification of Letters Patent.

Application filed June 17, 1920.

FILM CLIP.

Patented Mar. 7, 1922.

Serial No. 389,672.

Figure l, is a side view of the jaw member ends with the jaw members opened or separated for insertion of the film therebetween.

Figure 5, is a similar view showing the jaw members released and just in the act of engaging the interposed film.

Figure 6, is a similar view after the jaw members have performed their perforating function.

Figure 7, is a front edge view, on an enlarged scale, of one set of teeth with the latter in the position shown in side elevation in Figure 6.

Figure 8, is a plan view showing the teeth in the same position shown inFigure 7.

Like characters of reference designate similar views throughout the different figures of the drawings.

As shown, my improved clip comprises a pair of coacting aw members having means for actuating the same, said means being preferably in the form of a resilient handle 1, the bight of which is indicated at 2. This spring handle is constructed so that it will normally act to bring the jaws together, pressure in the direction of the arrows serving to open the jaws. One handle section is indicated at 3, and the other at t, for convenience in the further description of the structure and operation. The handle sec tions a re disposed in or have crossed sections 5 and 6, sections 5, being bifurcated and being secured to jaw member 7 Jaw member 7, is of U-shaped form, the ends thereof, indicated at 8, and being formed into substantially V-shaped perforating teeth 9, one for each jaw end. These teeth, which are not strictly speaking, exactly V-shaped in form, but which are substantially so, each hare a perforating apex 10, of chisel form, a slanting guiding edge ll and a straight edge 12. The inside corner edge 13, is shau pencd, and. if desired, the outside edge-11.4, but this latter is not essential. The chisel apex 10, is also sharp. T. have shown all the figures twice the actual size except Figure 7, which is about a four times enlargement, this statement giving a. clearer idea of the shearing and perforating action to be later de scribed. Rearwardlv of the teeth 9, the limbs or ends of the jaw 7, are recessed at 15, this portion being in-active.

Section 6, terminates in the remaining aw member 16, the latter being formed integral therewith, as shown. The end portions of the U-sl'niped jaw member 16, are shaped to form teeth 17 and 18, two of such teeth being formed at each end of the jaw member 16. These teeth 17 and 18, need not be cutting teeth as they, in the preferred form, merely coact with the perforating tooth 9, to fa c-ilitate entrance and passage of the perforating tooth or teeth 9, through the film. It will be noted that the teeth 17 and 18 are substantially Vshaped and that they are offset with respect to each other and are disposed with respect to the perforating teeth sothat tooth l7 will coact in lateral shearing relation with the perforating teeth 9, lying inside thereof while teeth 18, coact in edgewise shearing relation to the peri'iorating teeth 9. The teeth 17, have slanting edges 19, which function, when the jaw members are separated, to guide the film in between the teeth, together with the slanting edges 11. It will be understood that in practice, the jaws are not always opened to the extent shown in Figure 4:, hence, with this guiding feature, the operator is always sure of getting the film between the teeth without close observation, or without observing at all, and merely by projecting the film end between the jaws. The apices 20, of teeth 17, are preferably not sharp, neither are the slanting edges 19 nor the straight edges 21. Teeth 18, have straight edges 22' and slanting edges 23, likewise chisel ends 24, which are preferably not sharp. The straight edge 22 of tooth 18, is in edge to edge relation to the ed e 12 oftooth 9, because when the jaw mem ers are closed, the tooth 1S in a plane co-incident with the plane of tooth 9. Further, the apices 20 and 2f lie on opposite sides of the apex 10, thereby functioning to crimp or curl the film as shown in Figure 6, during the perforating operation. This greatly facilitates entrance of the apex 1.0 into the film.

. Now it will be seen that by reason of the fact that only the teeth 9, perforate the film, only comparatively small slits in the film end are formed. Therefore, the work of the spring handle is greatly reduced compared to what it would have to perform if two or all three teeth perforated the film. Further, as seen from Figure 5, all the areas of both sides of the film end are exposed to the developer, and later to the air, by reason of the fact that only the apices 20 and 24 are in en 'gag'ement with the film.

It will be seen from Figure 8, that while the apices 10, beneath the frlm, and, the apices 20 and 24, above the film, are in very close proximity, they are in offset relation just sufiicient to miss contact when passing, that is, theapices 20 and 24, just miss engagement when passing apex 10. Irrespective of the sharpness ordullness of the apices, this relation serves to concentrate pressure of the epic-es, jointly, on the film in a mannor to promote and effect a perforation opera aion, and this is distinctly a feature of this invention. It will be seen that just prior to actual perforation, a plurality of teeth engage the opposite surfaces of the film.

A special advantage resides in the shape of he perforation made by the teeth as it has been found that a slit is much more easily made, and with less spring pressure, than a. circular opening. This is due to the fact that a circular opening requires a conical pin which incr ases the. resistance offered the pin passes through the film thereby requiring assistant pressure of the operator, in addition to the handle spring.

lVhile I have herein shown one form of my invention, I do not wish to be limited thereto except for such limitations as the claims may import.

I claim 2- 1. A film clip comprising a pair of coacting jaw members having resilient means normally closing said jaw members, characterized by one jaw member having two V- shape-cl film engaging teeth in laterally offset relation or planes, the remaining jaw member having a V-shaped film perforating tooth in lateral coact ing relation with one of said offset teeth and in edge coacting relationwith the remaining offset tooth.

A film clip comprising a pair of coacting jaw members having resilient means normally closing said members, characterized by one jaw member having two V- shaped film engaging teeth, the remaining jaw member having a film perforating V- shaped tooth in lateral coacting relation with one of said engaging teeth and in edge coacting relation with the other film engaging tooth.

3. A film clip comprising a pair of coact-' ing jaw members having resilient means normally closing said members, character ized by one jaw member having two V- shaped film engaging teeth, the remaining jaw member having a V-shaped film perforating tooth, the apices of the film engaging and perforating teeth traversing substantially offset paths of travel when the jaw members are opened and closed.

i. A film clip comprising a pair of coasting jaw members having resilient means for ctuating said members, characterized by V- shaped teeth on said members having slanting guiding edges for guiding the film between. the teeth of the opposing members when the latter are separated.

5. A film clip having a pair of coacting jaw members provided with resilient means for actuating the same, characterized by a V-shaped film forcing tooth on one member and a V-shaped film perforatin' tooth on the other member, the slanting e go of said forcing tooth being in shearing relation with the slanting edge of the perforating toot-h.

6. A film clip having a pair of coacting jaw members provided with resilient means for actuating); the same, characterized by two V-shaped teeth on one member and a perforating tooth on the other member, one 0 said two teeth forcing the film against said perforating tooth in a lateral direction of thrust with respect to said perforating tooth and the other of said two teeth forcing the film onto the perforating tooth in a direction of thrust edgewise of the perforating tooth.

7. A film clip having a pair of coacting jaw members provided with resilient means for actuating the same, characterized by coacting projecting elements on said aws having combined. pressure and shearing action to perforate an interposed film end.

8. A film clip having a pair of coacting jdW members provided wlth actuating means, characterized by sharp pointed and pointed elements on said members coacting in opposite directions to cause the sharp pointed elements to perforate the film.

9. A film clip comprising a pair of jaw members provided with coacting sharp pointed and pointed teeth for effecting perforating engagen'ient with an interposed film end.

10. A film clip having oH-set teeth exercising opposing shearing and perforating action on opposite sides of the film to perforate the latter,

HAROLD L. BURST. 

